model.h

#ifndef __LTP_POSTAGGER_MODEL_H__
#define __LTP_POSTAGGER_MODEL_H__

#include "featurespace.h"
#include "parameter.h"

#include "smartmap.hpp"

namespace ltp {
namespace postagger {

using namespace ltp::utility;

class Model {
public:
    Model();
    ~Model();

    /*
     * get number of labels;
     *
     *  @return     int     the number of labels
     */
    inline int num_labels(void) {
        return labels.size();
    }

    /*
     * save the model to a output stream
     *
     *  @param[out] ofs     the output stream
     */
    void save(std::ostream & ofs);

    /*
     * load the model from an input stream
     *
     *  @param[in]  ifs     the input stream
     */
    bool load(std::istream & ifs);
public:
    IndexableSmartMap   labels;
    FeatureSpace        space;
    Parameters          param;

private:
    void write_uint(std::ostream & out, unsigned int val) {
        out.write(reinterpret_cast<const char *>(&val), sizeof(unsigned int));
    }

    unsigned int read_uint(std::istream & in) {
        char p[4];
        in.read(reinterpret_cast<char*>(p), sizeof(unsigned int));
        return *reinterpret_cast<const unsigned int*>(p);
    }
};

}       //  end for namespace postagger
}       //  end for namespace ltp

#endif  //  end for __LTP_POSTAGGER_MODEL_H__